Number 1 would probably gain short-term attention… until the local council whitewashed the wall…
Number 2 would probably have negligible effect (as Nick/Tyrong mentions above).
Number 3 would definitely shock the art world… as well as attracting criminal charges, so is likely to be the most effective of the three.

Regarding your main threat… that’s what they all say. So, I believe that’s a risk we shall just have to take. Likewise with your threat to commit creative vandalism against the artworks we have on display; with our security, you’d have to be some sort of tribal guerrilla ninja to get a scraper anywhere near them.

Regards,
Dean of Admissions, Academy of Fine Arts, Vienna”

Larisa: Ye Thuza, pleeeeze!

Ye Thuza: No, Larisa. Not my sort of thing. Oh, and watch your back!

(The masked and hooded figure of Banksy scuttles off, having sprayed “Stop me before I paint another landscape!” on her back. In fire retardant.)

Couldn’t the last panel be considered Dada? And for those of you who don’t know: Dada rejects reason and logic, prizing nonsense, irrationality and intuition. In other words, Dada was anti-art. Art that set out to destroy other art, due to the first world war. The movement was born from Hans Richter, Tristan Tzara, and Hugo Ball, in Zurich Switzerland. It set out to, like I said destroy other art, through nonsense, irrationality and intuition, because the above mentioned men, saw no value in a society that could produce a human bloodbath like the first world war. Larisa just took it to the extreme, by literally destroying art, to “Make Art”. So she took Dada to its most extreme avenue.

Just started reading this comic yesterday. Just finished all 402 and can’t wait for 403. Love this series! Well done! (Banksy graffiti trapped by Thomas Kincaid imagery would be some epic irony, albeit short lived.)

Regarding the second method, I actually wrote a short story about this a while back. An art student travels back in time, not to Berlin in 1933 to kill Hitler, but to Vienna in 1908 to convince him to continue pursuing his dream of becoming an artist, and ends up changing the course of history. The research I did for this was interesting to say the least. It seems that after his mother Klara died of cancer, Adolf developed an obsession with superficial perfection, for both human and architectural forms. He believed art should never reflect things like sadness, decrepitude, or ruin; and was unwilling to look beneath the surface. This might explain the motivations for his policies of ethnic cleansing the rebuilding of many of Berlin’s structures, in order to wipe out what he saw as imperfection in the world around him.

It’s always tragic when an aspiring artist abandons his dreams and gives into despair and hatred.